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std::unary_function

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< cpp‎ | utility‎ | functional

 
 
ユーティリティライブラリ
支援を入力します (basic types, RTTI, type traits)
動的なメモリ管理
エラー処理
プログラムユーティリティ
可変個引数関数
日付と時刻
関数オブジェクト
initializer_list(C++11)
bitset
hash(C++11)
関係演算子
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Relational operators
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
rel_ops::operator>=
ペアとタプル
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Pairs and tuples
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pair
tuple(C++11)
piecewise_construct_t(C++11)
piecewise_construct(C++11)
フォワード、スワップ、および移動
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Swap, forward and move
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swap
forward(C++11)
move(C++11)
move_if_noexcept(C++11)
declval(C++11)
 
関数オブジェクト
関数ラッパー
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Function wrappers
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function(C++11)
mem_fn(C++11)
bad_function_call(C++11)
バインド
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Bind
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bind(C++11)
is_bind_expression(C++11)
is_placeholder(C++11)
_1, _2, _3, ...(C++11)
リファレンス·ラッパー
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Reference wrappers
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reference_wrapper(C++11)
ref
cref
(C++11)
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オペレーターのラッパー
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Operator wrappers
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否定子
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Negators
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バインダーおよびアダプタは非推奨になりました
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Deprecated binders and adaptors
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unary_function(廃止予定)
binary_function(廃止予定)
ptr_fun(廃止予定)
pointer_to_unary_function(廃止予定)
pointer_to_binary_function(廃止予定)
mem_fun(廃止予定)
mem_fun_t
mem_fun1_t
const_mem_fun_t
const_mem_fun1_t
(廃止予定)
(廃止予定)
(廃止予定)
(廃止予定)
mem_fun_ref(廃止予定)
mem_fun_ref_t
mem_fun1_ref_t
const_mem_fun_ref_t
const_mem_fun1_ref_t
(廃止予定)
(廃止予定)
(廃止予定)
(廃止予定)
binder1st
binder2nd
(廃止予定)
(廃止予定)
bind1st
bind2nd
(廃止予定)
(廃止予定)
 
Defined in header <functional>
template <typename ArgumentType, typename ResultType>
struct unary_function;
(廃止予定)
unary_functionつの引数を持つ関数オブジェクトを作成するための基本クラスです.
Original:
unary_function is a base class for creating function objects with one argument.
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unary_functionoperator()を定義していません、それは派生クラスがこのように定義されることが期待される。 unary_function2種類のみを提供します - argument_typeresult_type - テンプレートパラメータによって定義された.
Original:
unary_function does not define operator(); it is expected that derived classes will define this. unary_function provides only two types - argument_type and result_type - defined by the template parameters.
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そのようなstd::not1などの一部の標準ライブラリ関数オブジェクトアダプタは、彼らが特定の種類が定義されているように適応する関数オブジェクトを必要とします。std::not1argument_type名前付きの型を持っているように適合されている関数オブジェクトを必要とします。 unary_functionから、1つの引数を取る関数オブジェクトを導出することは、これらのアダプタと互換性を持たせるための簡便な方法で..
Original:
Some standard library function object adaptors, such as std::not1, require the function objects they adapt to have certain types defined; std::not1 requires the function object being adapted to have a type named argument_type. Deriving function objects that take one argument from unary_function is an easy way to make them compatible with those adaptors.
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unary_functionは、C + +11では推奨されません。その機能はstd::functionによって廃止された.
Original:
unary_function is deprecated in C++11. Its functionality has been made obsolete by std::function.
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[編集] メンバータイプ

タイプ
Original:
Type
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Definition
argument_type ArgumentType
result_type ResultType

[編集]

#include <algorithm>
#include <functional>
#include <iostream>
#include <vector>
 
struct less_than_7 : std::unary_function<int, bool>
{
    bool operator()(int i) const { return i < 7; }
};
 
int main()
{
    std::vector<int> v;
    for (int i = 0; i < 10; ++i) v.push_back(i);
 
    std::cout << std::count_if(v.begin(), v.end(), std::not1(less_than_7()));
 
    /* C++11 solution:
        // Cast to std::function<bool (int)> somehow - even with a lambda
        std::cout << std::count_if(v.begin(), v.end(),
            std::not1(std::function<bool (int)>([](int i){ return i < 7; }))
        );
    */
}

Output:

3

[編集] も参照してください

(C++11)
指定された関数呼び出しシグネチャを持つ任意の型の呼び出し可能オブジェクトをラップします
Original:
wraps callable object of any type with specified function call signature
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(クラステンプレート) [edit]
(廃止予定)
関数へのポインタからアダプタと互換性のある関数オブジェクトのラッパーを作成します
Original:
creates an adaptor-compatible function object wrapper from a pointer to function
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(関数テンプレート) [edit]
単項関数へのポインタのためのアダプターと互換性のあるラッパー
Original:
adaptor-compatible wrapper for a pointer to unary function
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(クラステンプレート) [edit]
(廃止予定)
アダプタと互換性のあるバイナリ関数基底クラス
Original:
adaptor-compatible binary function base class
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(クラステンプレート) [edit]